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Continue to ChatRestricting Users to Send mails to Certain Domains on Zimbra 8.5 https://imanudin.net/2014/10/13/restricting-users-to-send-mails-to-certain-domains-on-zimbra-8-5/
Restricting Users to Send mails to Certain Domains on Zimbra 8.5 https://imanudin.net/2014/10/13/restricting-users-to-send-mails-to-certain-domains-on-zimbra-8-5/